fix: type annotations and import order in utils and tests

[Lumabots]

Corrected type annotation for is_none_pred in test_find_util.py and adjusted import order for consistency in several test files. Added a pyright ignore comment in public.py to suppress a false positive type check. Minor regex fix in test_snowflake_datetime.py for ValueError match.

Summary

Information

• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed).
• This PR is not a code change (e.g. documentation, README, typehinting,
  examples, ...).

Checklist

• I have searched the open pull requests for duplicates.
• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• If type: ignore comments were used, a comment is also left explaining why.
• I have updated the changelog to include these changes.

[pycord-app]

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This pull request can be checked-out with:

git fetch origin pull/138/head:pr-138
git checkout pr-138

This pull request can be installed with:

pip install git+https://github.com/Pycord-Development/pycord-next@refs/pull/138/head

[read-the-docs-community]

Documentation build overview

📚 pycord-next | 🛠️ Build #29835164 | 📁 Comparing 489f60d against latest (bc48553)

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_modules/discord/utils/public.html	📝 modified